First, apologies for being lethargic with the reply – I didn’t see the comment or I would have answered promptly!

There are two different setups. One is where you have one singular business that offers services in multiple cities. So, if you have a business that is out of Dallas, say, and also does work in Austin, you could create one business entry and associate it with the two cities. That can work. But, in many situations it’s more advantageous (and appropriate) to add an individual “Location” (it’s an entirely unique entry to the first one).

In your situation, I’m almost certain without knowing more that you’ll want to have multiple listings.

For others, and for you, David, here’s a few situations where you’d want to have unique listings, as opposed to a single listing with a service area:

1. You have two+ physical offices with unique telephone numbers and you want to route calls to each local number.
2. You have two+ physical office locations that share a number (and area code), but the area served is non-contiguous (if you set up a ‘service area’ as it stands today, it makes the area contiguous. If you said your service area was Los Angeles, Phoenix, and Anchorage, it would create a triangle using those three city centers and call that your service area. If you don’t do business in Nevada, you’ve got a problem!).
3. You have two+ physical offices that offer different products or services. That’s pretty straightforward… You’d definitely want separate listings.

Luckily, Google Local (or “Places” at it will soon be known) makes it easy to set up multiple locations that you can check in on by logging in to the Google Local Business center with one login. In the Google Local Business Center, http://www.google.com/lbc, simply setup your first business, then, when you’re done, go back to the Dashboard and click “+ Add a new listing.” Just create a listing for the additional office location.

I think that’s what your after David. I hope I helped. If I didn’t answer your question, please let me know!